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Identification of iron-bearing minerals in basalts and pillow lavas of the Kaczawa Mountains using 57Fe Mössbauer spectroscopy

Malczewski D., Jeleń M., Żaba J., Błachowski A., Ruebenbauer K., Dziurowicz M.

Nukleonika

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2017

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Vol. 62, No. 2

145--148

EN

The Kaczawa Mountains along with the Kaczawa foothill comprise a complicated geological unit that is called the Kaczawa metamorphic (Sudetes, SW Poland). The aim of our work was to identify the iron-bearing minerals in samples of basalts and pillow lavas from the Kaczawa metamorphic using 57Fe Mössbauer spectroscopy. Based on the preliminary results, the Fe3+/Fe2+ ratio in the samples was determined.

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Laboratory measurements of natural radioactivity in selected igneous rocks of the Opava Mountains region

Dżaluk A., Malczewski D., Żaba J., Dziurowicz M.

Geology, Geophysics and Environment

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2015

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Vol. 41, no. 1

73--74

EN

The paper presents the results of the laboratory gamma-ray measurements of six igneous rocks from the Opava Mountains. The Opava Mountains are located in the Eastern Sudetes and represent their furthest eastern range. They run almost latitudinally along the Polish border with the Czech Republic. The Opava Mountains are mostly situated in the Czech Republic. Only a small fragment between Głuchołazy in the west and Prudnik in the east is situated in Poland (Janeczek et al. 1991). The study area is built of rocks of different ages and lithologies. The Opava Mountains belong to the western part of the Upper Silesia Block, which together with the Brno Block form a structure that is called the Brunovistulicum. The mountains consist of five structural stages: the Žulova Massif, the Desna Series, the Vrbno Series, the Andělská-Hora Formation and the Horn-Benešov Formation, which run longitudinally (Żaba et al. 2005). The activities of naturally occurring radionuclides were measured using a portable GX3020 gamma-ray workstation. The system is based on a high-purity germanium (HPGe) detector with a 32% relative efficiency and energy resolutions of 0.8 keV at 122 keV and 1.7 keV at 1330 keV. The activity concentrations of 40K varied from 519 Bq∙kg−1(paragneiss, Głuchołazy/Mikulice) to 1559 Bq∙kg−1(weathered granite, Sławniowice), while those of 228Ac (232Th series) from 7.2 Bq∙kg−1(weat hered granite, Sławniowice) to 70.6 Bq∙kg−1 (migmatitic gneiss, Nadziejów). The activities that were associated with 226Ra (238U series) ranged from 5.5 Bq∙kg−1(weathered granite, Sławniowice) to 52.2 Bq∙kg−1 (gneiss, Kamienna Góra). The measured activity concentrations were compared with the average activity concentration of 40K, 228Ac (232Th) and 226Ra (238U) for similar types of rocks reported in the world specialist literature. The average value of the activity concentrations of 40K for granites and gneisses equals 1000 Bq∙kg−1 (Van Schmus 1995, Eisenbud & Gesell 1997), which means that the measured value of granite in the Sławniowice quarry is significantly higher than the average one, whereas the activity concentration of paragneiss is almost two times lower than the average value of similar types of rocks. The activity concentrations of 228Ac (232Th) and 226Ra (238U) in measured rocks are comparable to the average values (70 Bq∙kg−1 and 40 Bq∙kg−1 respectively (Van Schmus 1995, Eisenbud & Gesell 1997). Only the activity concentrations of granite in the Sławniowice quarry are considerably lower than the average values for the typical ones because it is strongly weathered. The aim of this paper is to show the first experimental data concerning the activity concentrations of primordial radionuclides in the igneous rocks in the Opava Mountains.

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In situ measurements of natural radioactivity in selected igneous rocks of the Opava Mountain region

Dżaluk A., Malczewski D., Żaba J., Dziurowicz M.

Contemporary Trends in Geoscience

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2014

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Vol. 3, iss. 1

5--13

EN

In situgamma-raymeasurements of fourigneousrocksweretaken in the Opava Mountains (EasternSudetes, Poland). The activity of naturallyoccurringradionuclides was measuredusing a portable GX3020 gamma-rayspectrometryworkstation. The activityconcentrations of 40K varied from 914 ± 17 Bqkg-1 (gneiss, Kamienna Góra) to 2019 ± 37 Bqkg-1 (weatheredgranite, Sławniowice), whilethose of 232Th from 7.5 ± 0.6 Bqkg-1 (weatheredgranite, Sławniowice) to 68 ± 0.9 Bqkg-1 (migmatiticgneiss, Nadziejów). The activitiesassociated with 238U decayseriesranged from 10 ± 0.4 Bqkg-1 (weatheredgranite, Sławniowice) to 62 ± 1.6 Bqkg-1 (gneiss, Kamienna Góra). The resultswill be used in compilingRadiological Atlas of the Sudetes.

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Influence of Metalliferous Minerals on Biotic Components of Top Soil in Zinc-Lead Flotation Tailings Ponds

Cabala J., Pacholewska M., Dziurowicz M.

Ecological Chemistry and Engineering. A

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2009

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Vol. 16, nr 7

723-728

EN

The mineral components of topsoil in the zinc and lead flotation tailings ponds were analyzed. To examine such minerał components the authors used methods such as scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and atomic absorption spectroscopy (AAS). The goal of this study was to pay particular attention to the secondary metalliferous mineral phases formed in rhizosphere zones mainly on plant roots and the influence of autochthonous sulphur bacteria and fenic bacteria on the chemical mechanism of waste components. This study aims both to recognize the (bio)chemical change of flotation tailings which is of great significance for the yegetation of plants, fungi and microorganisms and to properly plan the treatment connected with reclamation and phytoremediation of the area affected by waste disposal.

PL

Autorzy za pomocą metod elektronowej mikroskopii skaningowej (SEM), mikroanaliz (EDS) oraz analiz chemicznych (AAS) badali składniki mineralne wierzchnich warstw odpadów zdeponowanych na składowiskach poflotacyjnych rud Zn-Pb. Szczególną uwagę zwrócono na wtórne, metalonośne fazy mineralne powstałe w strefach ryzosferowych, na powierzchni korzeni roślin oraz na wpływ autochtonicznych bakterii siarkowych i żelazowych na chemizm odpadów. Przeprowadzone badania są przydatne dla poznania (bio)chemicznych przemian odpadów poflotacyjnych, które mają duże znaczenie dla wegetacji roślin, grzybów i mikroorganizmów. Są one ważne dla prawidłowego projektowania zabiegów rekultywacyjnych i fitostabilizacji składowisk.